The answer upstairs is wrong. A4 is A4, neither B5 nor 16K. Among the commonly used papers, one size is 16K, and the area of two pieces of 16K is 8K. When A4 paper is widely used as standard paper, 16K and 8K are the most commonly used specifications. Your paper should be printed on 16K paper. I suggest you find 16K paper to print. There is a place to sell office supplies.